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The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis
Sexual selection is considered the major cause of sexual dimorphism, but recent observations suggest that natural selection may play a more important role in the evolution of sex differentiation than previously recognized. Therefore, studying the trade-offs between natural selection and sexual selec...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5905518/ https://www.ncbi.nlm.nih.gov/pubmed/30402058 http://dx.doi.org/10.1093/cz/zox043 |
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author | Laporte, Martin Berrebi, Patrick Claude, Julien Vinyoles, Dolors Pou-Rovira, Quim Raymond, Jean-Claude Magnan, Pierre |
author_facet | Laporte, Martin Berrebi, Patrick Claude, Julien Vinyoles, Dolors Pou-Rovira, Quim Raymond, Jean-Claude Magnan, Pierre |
author_sort | Laporte, Martin |
collection | PubMed |
description | Sexual selection is considered the major cause of sexual dimorphism, but recent observations suggest that natural selection may play a more important role in the evolution of sex differentiation than previously recognized. Therefore, studying the trade-offs between natural selection and sexual selection is crucial to a better understanding of the ecology underlying the evolution of sexual dimorphism. The freshwater blenny Salaria fluviatilis, a fish inhabiting lakes and rivers around the Mediterranean Sea, displays strong sexual dimorphism in size, shape, and behavior (i.e., larger body and head size for males and higher swimming requirements for females during the reproductive period). We tested for differences in sexual dimorphism in size and shape between the populations from lake and river habitats with the goal of identifying the trade-offs between natural and sexual selection that underlie variations in sexual dimorphism in this species. Our results show i) differences in sexual size dimorphism (SSizeD) in accordance to Rensch’s rule (i.e., larger individuals in rivers associated with higher SSizeD), and ii) a decrease in shape differentiation between males and females in lake populations. Together, this suggests that the different environmental conditions between lake and river habitats (e.g., resource limitations, predation pressure, water velocity) affect the relative importance of sexual selection in the display of sexual dimorphism within the species. This study highlights the importance of considering the environmental conditions to which populations are exposed to better understand the ecology underlying the evolution of sexual dimorphism. |
format | Online Article Text |
id | pubmed-5905518 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-59055182018-11-06 The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis Laporte, Martin Berrebi, Patrick Claude, Julien Vinyoles, Dolors Pou-Rovira, Quim Raymond, Jean-Claude Magnan, Pierre Curr Zool Articles Sexual selection is considered the major cause of sexual dimorphism, but recent observations suggest that natural selection may play a more important role in the evolution of sex differentiation than previously recognized. Therefore, studying the trade-offs between natural selection and sexual selection is crucial to a better understanding of the ecology underlying the evolution of sexual dimorphism. The freshwater blenny Salaria fluviatilis, a fish inhabiting lakes and rivers around the Mediterranean Sea, displays strong sexual dimorphism in size, shape, and behavior (i.e., larger body and head size for males and higher swimming requirements for females during the reproductive period). We tested for differences in sexual dimorphism in size and shape between the populations from lake and river habitats with the goal of identifying the trade-offs between natural and sexual selection that underlie variations in sexual dimorphism in this species. Our results show i) differences in sexual size dimorphism (SSizeD) in accordance to Rensch’s rule (i.e., larger individuals in rivers associated with higher SSizeD), and ii) a decrease in shape differentiation between males and females in lake populations. Together, this suggests that the different environmental conditions between lake and river habitats (e.g., resource limitations, predation pressure, water velocity) affect the relative importance of sexual selection in the display of sexual dimorphism within the species. This study highlights the importance of considering the environmental conditions to which populations are exposed to better understand the ecology underlying the evolution of sexual dimorphism. Oxford University Press 2018-04 2017-06-30 /pmc/articles/PMC5905518/ /pubmed/30402058 http://dx.doi.org/10.1093/cz/zox043 Text en © The Author (2017). Published by Oxford University Press. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Articles Laporte, Martin Berrebi, Patrick Claude, Julien Vinyoles, Dolors Pou-Rovira, Quim Raymond, Jean-Claude Magnan, Pierre The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis |
title | The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis |
title_full | The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis |
title_fullStr | The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis |
title_full_unstemmed | The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis |
title_short | The ecology of sexual dimorphism in size and shape of the freshwater blenny Salaria fluviatilis |
title_sort | ecology of sexual dimorphism in size and shape of the freshwater blenny salaria fluviatilis |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5905518/ https://www.ncbi.nlm.nih.gov/pubmed/30402058 http://dx.doi.org/10.1093/cz/zox043 |
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